| 单词 | multiple tier timeline |
| 释义 | multiple tier timelineˌmultiple tier ˈtimeline noun [countable] social studies a timeline (=a line showing the order in which events happened over a particular period of time) with two or more rows of events, each representing a different subject, activity, etc.: a multiple tier timeline of the 19th century, with separate rows for political, social, military, and technological developments |
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